Core-shell structure high-strength anti-seismic unbaked ceramsite and preparation method and application thereof

Abstract

The invention discloses a core-shell structure high-strength anti-seismic unbaked ceramsite and a preparation method and application thereof. The ceramsite comprises a core and a shell wrapped outside the core and consists of, by weight, building solid waste 77.73%-86.73%, foam balls 0.23%-0.43%, portland cement 12.95%-16.95%, silica micropowder 2.59%-3.39% and composite organic bonding agent 1.10%-1.50%. The foam balls serve as the core, and the rest serves as the shell. The building solid waste and packaging waste serving as renewable resources are fully utilized and manufactured into the unbaked ceramsite which is used for building concrete aggregate and is light in weight, high in strength and strong in anti-seismic performance, thereby effectively reducing pollution, turning the waste into wealth, simultaneously reducing the building cost and having high social value and economic value.

Description

technical field [0001] The invention relates to a building material, in particular to a core-shell structure high-strength anti-seismic type non-fired ceramsite used as aggregates for various types of lightweight concrete used in construction. The invention also relates to a preparation method and application of the ceramsite. Background technique [0002] Traditional ceramsite is generally made of clay, shale, fly ash, etc. after firing. The process is complicated and energy consumption is high; the ceramsite made is a solid structure as a whole, and the material is a dense ceramic structure with a large volume and a large elastic modulus. Poor, poor thermal insulation and sound insulation capabilities. [0003] In order to solve the above problems, the Chinese patent application No. 01250823.3 discloses a kind of non-fired ceramsite, the structure of which is to use light particles with voids as the core, and a hard shell is bonded outside the core. The lightweight parti...

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Problems solved by technology

Although the ceramsite of this structure solves the three waste utilization problems of fired ceramsite and the heat insulation performance as a building material to a certain extent, it has the following problems: Compared with light and high-strength unfired ceramsite, First, due to its thin hard shell, its cylinder compressive strength is low, which cannot reach the 4.0MPa required by the relevant national standards; second, the existing hard shell only adopts ordinary technology, mixing cement or binder in light The surface of the particle is formed by consolidation, and its combination with the core is not firm, and the production pass rate is low; third, the core-shell surface has few micropores, and the ceramsite is brittle and lacks toughness. After compression (impact), there is no buffer And it is easy to break, which leads to poor overall performance of the building materials produced from it, especially the poor seismic performance as building materials; Fourth, because the lightweight particles are made of foamed polymer materials and plant straw-like plant fiber groups, the interior of ceramsite It is difficult to form an overall cavity, or it is difficult to form a nearly circular jejunum, which affects the mechanical properties of cer

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